Viewing file:  smem.c (2.5 KB) -rw-r--r--
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#include <stdio.h>
#include <memory.h>
#include <string.h>
#ifdef __APPLE__
#include <stdlib.h>
#else
#include <malloc.h>
#endif
#include "fitsio.h" /* needed to define LONGLONG */
#include "drvrsmem.h" /* uses LONGLONG */
int main(int argc, char **argv)
{ int cmdok, listmode, longlistmode, recovermode, deletemode, id;
int status;
char *address;
listmode = longlistmode = recovermode = deletemode = 0;
id = -1;
cmdok = 1;
switch (argc)
{ case 1: listmode = 1;
break;
case 2:
if (0 == strcmp("-l", argv[1])) longlistmode = 1;
else if (0 == strcmp("-r", argv[1])) recovermode = 1;
else if (0 == strcmp("-d", argv[1])) deletemode = 1;
else cmdok = 0;
break;
case 3:
if (0 == strcmp("-r", argv[1])) recovermode = 1;
else if (0 == strcmp("-d", argv[1])) deletemode = 1;
else
{ cmdok = 0; /* signal invalid cmd line syntax */
break;
}
if (1 != sscanf(argv[2], "%d", &id)) cmdok = 0;
break;
default:
cmdok = 0;
break;
}
if (0 == cmdok)
{ printf("usage :\n\n");
printf("smem - list all shared memory segments\n");
printf("\t!\tcouldn't obtain RDONLY lock - info unreliable\n");
printf("\tIdx\thandle of shared memory segment (visible by application)\n");
printf("\tKey\tcurrent system key of shared memory segment. Key\n");
printf("\t\tchanges whenever shmem segment is reallocated. Use\n");
printf("\t\tipcs (or ipcs -a) to view all shmem segments\n");
printf("\tNproc\tnumber of processes attached to segment\n");
printf("\tSize\tsize of shmem segment in bytes\n");
printf("\tFlags\tRESIZABLE - realloc allowed, PERSIST - segment is not\n");
printf("\t\tdeleted after shared_free called by last process attached\n");
printf("\t\tto it.\n");
printf("smem -d - delete all shared memory segments (may block)\n");
printf("smem -d id - delete specific shared memory segment (may block)\n");
printf("smem -r - unconditionally reset all shared memory segments\n\t\t(does not block, recovers zombie handles left by kill -9)\n");
printf("smem -r id - unconditionally reset specific shared memory segment\n");
}
if (shared_init(0))
{ printf("couldn't initialize shared memory, aborting ...\n");
return(10);
}
if (listmode) shared_list(id);
else if (recovermode) shared_recover(id);
else if (deletemode) shared_uncond_delete(id);
for (id = 0; id <16; id++) {
status = shared_getaddr(id, &address);
if (!status)printf("id, status, address %d %d %ld %.30s\n", id, status, address, address);
}
return(0);
}
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